Actions for Recent Observations on a Horizontal Instability in the DAFNE Positron Ring [electronic resource].

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Recent Observations on a Horizontal Instability in the DAFNE Positron Ring [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2006.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
3 pages : digital, PDF file
Additional Creators
Stanford Linear Accelerator Center, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A strong horizontal instability limits the maximum positron current storable in the DAFNE Phi-Factory. A powerful feedback system makes it possible to store and put in collision more than 1300 mA of positron current in 105-109 bunches. Nevertheless, a much higher current (>2.4A) has been successfully stored in the twin electron ring. Measurements have been carried out to understand the positron current limit and to characterize the behavior of the horizontal instability at high current with different bunch patterns. Grow/damp turn-by-turn data obtained by turning off the horizontal feedback have been acquired and analyzed. Spectral analysis and growth rates of the instability are shown. In particular, the -1 mode has strong evidence and fast growth rate. Its growth rate behavior is analyzed at different beam currents and bunch patterns.
Report Numbers
E 1.99:slac-pub-11654
slac-pub-11654
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Note
Published through SciTech Connect.
01/20/2006.
"slac-pub-11654"
Prepared for Particle Accelerator Conference (PAC 05), Knoxville, Tennessee, 16-20 May 2005.
Zobov, M.; Drago, A.; Teytelman, D.
Funding Information
AC02-76SF00515
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